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extend PCR7 after using it to unlock the LUKS

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This commit is contained in:
Harald Hoyer 2018-09-05 15:23:03 +02:00
parent 52e5a2c9fa
commit 6910172911
2 changed files with 23 additions and 18 deletions
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34
pre-pivot.sh
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@ -52,22 +52,26 @@ if cryptsetup isLuks --type luks2 "$datadev"; then
luksdev=/dev/mapper/$luksname
if ! [[ -b $luksdev ]]; then
if ! cryptsetup luksDump "$datadev" | grep -F -q clevis ; then
udevadm settle --exit-if-exists=/dev/tpmrm0
export TPM2TOOLS_TCTI_NAME=device
export TPM2TOOLS_DEVICE_FILE=/dev/tpmrm0
if ! cryptsetup luksDump "$datadev" | grep -F -q clevis ; then
udevadm settle --exit-if-exists=/dev/tpmrm0
export TPM2TOOLS_TCTI_NAME=device
export TPM2TOOLS_DEVICE_FILE=/dev/tpmrm0
if echo -n "zero key" | clevis-luks-bind -f -k - -d "$datadev" tpm2 '{"pcr_ids":"7"}'; then
clevis-luks-unlock -d "$datadev" -n "$luksname" || die "Failed to unlock $datadev"
elif echo -n "zero key" | clevis-luks-bind -f -k - -d "$datadev" tpm2 '{"pcr_ids":"7","key":"rsa"}'; then
clevis-luks-unlock -d "$datadev" -n "$luksname" || die "Failed to unlock $datadev"
else
warn "Failed to bind disk to TPM2"
echo -n "zero key" | cryptsetup open --type luks2 "$datadev" $luksname --key-file /dev/stdin
fi
else
clevis-luks-unlock -d "$datadev" -n "$luksname" || die "Failed to unlock $datadev"
fi
if echo -n "zero key" | clevis-luks-bind -f -k - -d "$datadev" tpm2 '{"pcr_ids":"7"}'; then
clevis-luks-unlock -d "$datadev" -n "$luksname" || die "Failed to unlock $datadev"
elif echo -n "zero key" | clevis-luks-bind -f -k - -d "$datadev" tpm2 '{"pcr_ids":"7","key":"rsa"}'; then
clevis-luks-unlock -d "$datadev" -n "$luksname" || die "Failed to unlock $datadev"
else
warn "Failed to bind disk to TPM2"
echo -n "zero key" | cryptsetup open --type luks2 "$datadev" $luksname --key-file /dev/stdin
fi
else
clevis-luks-unlock -d "$datadev" -n "$luksname" || die "Failed to unlock $datadev"
fi
tpm2_pcrextend \
-T device:/dev/tpmrm0 \
7:sha1=f6196dd72e7fad01051cb171ed3e8a29f7217b3a,sha256=6064ec4f91ea49cce638d0b7f9013989c01cba8a62957ac96cd1976bb2e098fa 2>&1 \
|| die "Failed to extend PCR7"
fi
datadev="$luksdev"
fi

3
prepare-root.sh
View file

@ -207,7 +207,8 @@ chroot "$sysroot" \
--install "clonedisk wipefs sfdisk dd mkfs.xfs mkswap chroot mountpoint mkdir stat openssl" \
--install "clevis clevis-luks-bind jose clevis-encrypt-tpm2 clevis-decrypt clevis-luks-unlock clevis-decrypt-tpm2" \
--install "cryptsetup tail sort pwmake mktemp " \
--install "tpm2_createprimary tpm2_pcrlist tpm2_createpolicy tpm2_create tpm2_load tpm2_unseal tpm2_takeownership" \
--install "tpm2_pcrextend tpm2_createprimary tpm2_pcrlist tpm2_createpolicy" \
--install "tpm2_create tpm2_load tpm2_unseal tpm2_takeownership" \
--install "strace" \
--include /pre-pivot.sh /lib/dracut/hooks/pre-pivot/pre-pivot.sh \
--include /overlay / \